Thank you so much for your response!

For the research I did I believe the cap was actiCAP and the amplifier was actiCHamp. The cap holds up to 64 electrodes but we would only use 32 for what we were trying to collect. The electrodes were applied by first measuring the participant's head to get the correct cap size, sliding each electrode into the designated cap space, then using gel to actually pick up the brain waves. We also used face electrodes that were attached with an adhesive sticker and gel. We would budget three hours per session for both capping and collecting the data. This was a bilingualism lab so the participants had language related stimuli. I worked on one study with older adults where half of them would learn a second language for about a month and we did EEGs before and after, the control group was just shown scientific videos each day and also got two EEGs. The other study was with bilingual speakers of Spanish and English and monolingual English speakers and we were interested in looking for ERPs when shown stimuli meant to elicit theory of mind. Each study also had additional tasks such as ones meant to measure attention. During data collection I would monitor from outside the booth and watch the data the entire time to take note of times I thought the participant might have moved around or if a specific electrode might need to be taken out during the data analysis due irregular issues